Dog-house for open-hearth furnaces.



No. 888,962. PATENTED MAY 26, 1908. A. GRUICKSHANK.

DOG HOUSE FOR OPEN HEARTH FURNACES.

APPLICATION FILED JULY 10, 1907.

FIG. 2.

WITNESSES:

ADAM ORUICKSHANK, OF CHICAGO, ILLINOIS.

DOG-HOUSE FOR OPEN-HEAR'IH FURNACES.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed July 10, 1907. Serial No. 383,033

To all whom it may concern:

Be it known that I,,ADAM CnUIoKsHANK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dog-Houses for Open- Hearth Furnaces, of which the following is a specification.

My invention relates to open hearth furnaces and particularly contemplates the pro; vision of a dog-house built therein for the protection of the oil burners and the brick work thereabout.

My invention further and specifically re sides in the following features of construction, arrangement and operation as will be hereinafter described with reference to the accompanying drawings, in which Figure 1 is a vertical sectional view through the forward portion of an open hearth furnace illustrating my improvements attached thereto, and Fig. 2 is a view, half front elevation and half transverse section of the furnace and its improvements shown in Fig. 1.

In the accompanying drawings A repre sents an open hearth furnace comprising in its construction a front wall B and the sur rounding walls closing combustion chamber C. The oil pipe D is, as usual, arranged through the front wall B and combustion chamber 0 and provided with a regulating valve E.

A small opening is usually made through the wall B through which the pipe D projects within the combustion chamber C. This construction however, .necessitates a great amount of expense and work for the reason that the heat quickly burns out the pipe D and that portion of the wall B which surrounds the ,same. To obviate this expense I provide the wall B with acomparatively large opening 1 strengthened by an arch 2 thereabove and havingwalls 3 extending rearwardly within the combustion chamber 0. At the end of the walls 3 is arranged a downwardly slanting baflle wall 4 partially closing the chamber 5 formed by the walls 3 and providing a reduced opening 6 for the entrance pipe or pipes D. It will thus a low temperature in the pipes D andpreventing the heat of the combustion chamber burning out the same and the surrounding walls, it being of course understood that this dog-house construction comprising walls 3 and 4 and the surrounding parts will be entirely of fire brick construction.

Having thus fully described my invention, I claim:

1. The combination with a furnace and its inwardly extending fluid pipes, of a doghouse built through the wall of said furnace and comprising inwardly extending walls forming an air chamber within the same through which said pipes are arranged, and a wall at the inner end of said dog-house partially closing said chamber to protect the same from the heat within said furnace, substantially as described.

2. The combinationwith an open hearth furnace and its inwardly extending fluid pipes, of a dog-house built through the wall of said furnace and comprising inwardly extending walls forming an air chamber within the same having direct communication with the atmosphere, and a baflle wall slantingly arranged at the inner end of said dog-house, and partially closing said air chamber to protect the same from the heat within said. furnace, said bafile wall forming beneath the same an opening for the passage of said pipes through said dog-house within the furnace, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

, ADAM CRUIOKSHANK. 

